Allocation of Resources Without Limits or Throttling Affecting libxml2 package, versions <0:2.9.1-6.amzn2.4.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published27 Sept 2021
- disclosed8 Apr 2018
Introduced: 8 Apr 2018
CVE-2017-18258 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2 libxml2 to version 0:2.9.1-6.amzn2.4.1 or higher.
This issue was patched in ALAS2-2020-1466.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libxml2 package and not the libxml2 package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2 relevant fixed versions and status.
The xz_head function in xzlib.c in libxml2 before 2.9.6 allows remote attackers to cause a denial of service (memory consumption) via a crafted LZMA file, because the decoder functionality does not restrict memory usage to what is required for a legitimate file.
References
- https://kc.mcafee.com/corporate/index?page=content&id=SB10284
- https://security.netapp.com/advisory/ntap-20190719-0001/
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-18258
- https://git.gnome.org/browse/libxml2/commit/?id=e2a9122b8dde53d320750451e9907a7dcb2ca8bb
- https://lists.debian.org/debian-lts-announce/2018/09/msg00035.html
- https://lists.debian.org/debian-lts-announce/2020/09/msg00009.html
- https://usn.ubuntu.com/3739-1/